Paper-shell machine.



J. CHESNEY.

PAPER SHELL MACHINE.

APPLICATION FILED FEB. 24, 1908.

91 4,384,, Patented Mar. 9, 1909.

2 SHEETS-SHEET 1.

W/T/VESSES:

J. GHESNEY.

PAPER SHELL MACHINE.

APPLICATION FILED PEB.24, 1908. 914L 34 Patented Mar. 9, 1909.

2 SHEBTSSHBET 2.

{ w 390 4/ l I! l6 lij W W m W W 1 =1? W W W M1 WITNESSES: l/VVE/V7'0/1 gmma a 8V I 1 vi @417 JOHN CHESNEY, OE PAULSBORO, N

TED SATES are.

rarnrasmm. MAbmNE.

Specification of Letters Patent. application filed February 24, 1908. Serial No.- 417,468.

Patented March 9, 1909.

To all whom it may concern: 7

Be it known that I, .lomvfinnsnnr', a citiv zen of the United States, residing at Paulsboro, county of Gloucester, and State of New Jersey, have invented a new and useful Im provement in Paper-Shell Machines, of which the following is a full, clear, and exact description, reference being bad to the accompanying drawings, which form a part of this specification.

The object of the invention-is to provide improved means for pneumatically ejectinlg from a shell-forming mandrel the she formed thereon. f

Inthe drawings: Figure 1 is a plan view of the part of the machine embodying my invention. Fig. 2 is a side elevation of the same. Fig. 3 is a view, partly cut away, of

the admission of air to the ejecting tube and the exhaust to the mandrel.

10 is the frame of the machine. '11. is the table containing the sheets of 1paper thatare to be successively, fed to the o ow mandrel 12. The mandrel12 is provided with periorations13 so that, when. the

air is exhausted from the mandrel, atmospheric pressure will act uponithe paper to hold it securely in position upon the mandrel as it is wound thereon 1n the latters rotation. The rear part of the mandrel, which is imperforate and detaohably secured to the front perforated part, turns in bearings in the support 15 bolted to the machine frame. The rear end of the mandrel enters and turns in the forward end of a stationary exhaust cylinder M. The cylinder 14 is connected by means of pipes 16 and 17 to an exhaust chamber 18, suitable suction devices. (not shown) being applied to the exhaust chamber 18 to rarefy the air therein. Interposed between pipes 16 and 17 is a valve 19 (see 7) normally held by spring 20 against. its seat to close communication between the pipes 16 and 17. The stem 21 of the valve is operated at the proper time by a cam 22 on the main driving shaft23. When the valve 19 is thus operated, the air in the mandrel 12 and cylinder 14 is sucked into the suction chamber 18 through the pipes 16 and 17.

The mandrel 12 is provided at its forward end with a longitudinally retractable head 24 carried by bars 25 which extend lon itudinally of the mandrel and are secure toa ooved sleeve or collar 26 encircling the mandrel 12'.

The sliding bars 25 are preferably entered in longitudinal grooves formed in the wall of the mandrel body, the grooves and bars being of the same cross sectional dimensions, so

that the bars lie flush with the eriphery of the mandrel, the mandrel body t us presenting a continuous and unbroken periphery. The head..2.4 isprovided with. similar lo i? tudinal grooves in-itsinner wall to receive t v frontends of the bars 25;. Each bar 25is, oilset at 25.0 at the rear of its head engaging part, said ofi'set entering a notch in the forward end of the mandrel body. The mandrel head is similarly notched at its front end to receive outwardly extending projections 251, on the front ends of the bars 25. To'ap ply the mandrel head to the bars, the front ends of the latter are pressed toward each;

other (the bars bein snificiently flexible to permit this) andthe head is slip ed over the same into the position shown in the drawings, whereupon the bars are allowed to spring outwardly, whereby'the mandrel head is confined between. the projections 251 and offset 250. Preliminarily to the ejection oi. the finished shell from the mandrel, "and for purposes hereinaiter set forth, the collar 26 is moved forwardly along the mandrel from the position shown in Fig. 4 to the position 'shown'in Fig. 5 thereby advancin the head of the duel. This movementgof the mandrel head is affected by means of a lever 27 ivoted between it's ends at 28 to the mac e frame and on aging at one of its ends a groove 'in the co ar 26v and at its other end a-cam groove in a cam 29 secured to and turning with the driving shaft 23.

.Fittinglwithin be head 24, but loose with respect t ereto, is a ca 30, the head of the cap bein' provided wit perforations 3i and the interior of: thecap beingkthreadedi to reeeive thethreaded e d "of t e ejecting tube mandrel beyond the body 0 the mannw'mnssr, ASSIGNOR To THE E. 1. DU PONT DE NEMOURS 36 extends through the yoke '35 and bears against .the' closing plug 34. Byscrewing up the thumb screw 36,- the cyhnder 33 is pressed against .a stufiing box 37 secured tothe rear wall of the cylinder 14 and through which the rear end of the ejecting tube extends. K nut 38 011 the threaded rod 36 is tightened against the yoke 35.

. Air undellipressure is admitted by means of pipes 39 an 390 from the pressure chamber 40 to thepressure cylinder 33 and ejecting tube 32 thereby app ying air under pressure to the closed end of the paper shell formed on the mandrel for the purpose of ejecting the of the valve is operated atthe proper time by supports 15; a second gear 48 on the intermediate shaft 47 engaging a'gear 49 secured same therefrom, as is more particularly hereinafter described. Interposed between pipes 39 and 390 is a valve 41 normally held by the spring 42 against its seat to close communication between pipes 38 and 39. The stem 43' a cam 44 on the .main' driving shaft 23.

The mandrel is rotated by the usual means, namely by a gear 45, on the main driving shaft 23, that engages a gear 46 on an intermediateshaft 47 turning in bearings in the to the mandrel. w

The operation of the machine is as follows:

By means of the chain. ofgearing between the driving shaft 23 and the mandrel 12, the latter is rotated, and durin its rotation-a sheet of paper is transferred from table 11" to the mandrel by means not shown, and wound about the periphery of the mandrel, 'the pa per being held tightly against the mandrel by exhausting the air therefrom by cam 22 operating the valve 19 to opencommunication between the exhaust 18 and the mandrel, as

I hereinbefore described. During the said operatlon' or immediately at its conclusion, the

forward edge of the paper projecting beyond the head of the mandrel is crimp'ed or folded e ectlon from the mandrel, the mandrel is retracted from the body of the to close in the end of the fipaper tube and form the shell, this being a ected by means not shown. When the shell is' thus completed, the cam'22 passes out of engagement with the valve stem 21 and the spring 20 moves the valve to close communication between the exhaust chamber 18 and'the mandrel. The pa er shell is now free to be ejected from t e'mandrel butead of the mandrel by the action of cam 29and lever.27 as hereinbefore described, this being done for the purpose of loosening the shell from the rior to its mandrel to facilitate its ejection. After the liead is thus retracted from themandrel, the cam 44 engages the valve stem 43 to operate the valve 41 for the purpose of admitting air under pressure from the pressure cylinder to the ejecting tube 32. This compressed air.

passes out of the perforations 31 and acts upon the closed end. of the paper shell and blows it off the mandrel, immediately after which the cam 44 is retracted from the valve stem 43, whereupon the s ring 42 moves the valves 41 in position to close communication between the pressure chamber and the ejecting tube. This completes the operation.

,7 Having now fully described my invention, what I claim anddesire to Patent is:

1. In a paper shell-machine, the combina- I tion with the hollow perforated forming mandrel, of an ejecting tube extending into the mandrel, means to exhaust air from the mandrel, and means to admit air under pressure to the ejecting tube.

8 0 protect by Letters 2. In a paper shell machine, the combinae tion with the hollow perforated forming mandrel, of an ejecting tube extending'into the mandrel, a perforated cap closing the forwardends of the mandrel and ejecting tube,

means to exhaust air from the mandrel, and means. to admit air under pressure to the ejecting tube. p I

3. In a paper shell machine, the combination withthe forming mandrel comprising a body and a longitudinally retractable head in advance of and forming a continuation of the body, of means to retract the mandrel head preliminarily to ejecting the shell from the mandrel.

r 4. In a paper shell machine, the combination with the hollow perforated forming mandrel comprising a body and a longitudi nallyretracta tending into the mandrel, means to exhaust air from the mandrel, means to admit air under pressure to the ejecting tube,- and means to retract the mandrel head.

5. In a paper shell machine, the combination with the forming mandrel comprising a,

body and a longitudinally retractable head, of an ejecting tube extendinginto the mandrel, a cap closing the forward end of the mandrel and e ecting tube and having perwithsaid. tube,

forations communicatin means to exhaust air om the mandrel, means to retract the mandrel head from the mandrel body, and means to admit air under pressure to the ejecting tube. 1

le head, of an ejecting tube ex- 6. 'In a aper shell machine, th combination with t e hollow perforated f0 ming man-' h el, an e ecting tube extending from the out art of the mandrel through and be ond t e rear end thereof, an exhaust chamer, pipe connections therefrom to the man-F drel, a pressure cham'ber, pipe connections therefrom to the ejecting tube, valves inter Y outer wall s end thereofand through and beyond the rear said bars are attached, a main driving shaft,

posed in said pipe connections, a driving shaft, means operated thereby to actuate said valves, and driving connections from the driving shaft to the mandrel to rotate the latter.

7. In a aper shell machine, the combination with t e hollow erforated forming mandrel, a cylinder in w ich the rear end of said mandrel turns, an exhaust. chamber, pipe connections therefrom to said cylinder,"an ejecting tube extending from the front part of the mandrel through and beyond the rear wall of said cylinder, a second cylinder at and. communicating with the rear -end of the ejecting tube, a pressure chamber, pipe connections therefrom to the second cylinder, valves interposed in said pipe connections,.adriving shaft, means operated thereby to actuate said valves, and driving connections from the driving shaft to the mandrel.

8. In a paper shell machine, the combination with the forming mandrel comprising a lon itudinally grooved body and a longitudinal y grooved and longitudinally retractable head, of bars slidabe in grooves in the mandrel body and fixedly secured in the grooves of the mandrel head, and means to slide said bars in the grooves of the body to retract the head. I V

9. In a paper shell machine, the combination with the forming mandrel comprising a body having longitudinal grooves on its, and an independent head having longitudinal grooves in its inner wall, a contiguous notches at its front end, of bars extendin into said grooves and notches,:and movable ongitudinally in the grooves of the mandrel 'body.

10. In a l :aper shell machine, the combina tion with t e forming mandrel comprising a body and a longitudinally retractable. head, of bars slidable ingrooves in the mandrel body and enga ing the mandrel head, a sleeve slidable on-sait l mandrel body and to which and connections therefrom operating the. sleeve intermittently. f

11. In a paper shell machine, the combin ation with t e forming mandrel comprising a body and a longitudinally retractable head,

'spect to the bed mandrel, a yoke secured tofthe of bars slidable in groovesm the mandrel body and engaging the mandrel head, a sleeve which said bars are attached, a main' driving shaft, a cam thereon, .anda lever pivote between its ends, whose opposite ends engage grooves in the cam and sleeve res ectively.

12. In a aper shell machine,t e combination with tiie forming mandrel comprising a' body and a longitudinally movable head, ofv means to move the head forwardlfl with reto loosen theshe mandrel to fac' itate its ejection, and means for subsequently e'ecting the shell. 13. In a pa er shell machine, the combination with the orming mandrel composed of a body and an independently movable head, of means shell formed on the mandrel, and means to thereafter admit air under pressure to the movable head, thereby ejectingthe shell from the mandrel. v 14. In a pa er shell machine, the combination with the orming mandrel, of. an ejecting tube extending from the forward end of the mandrel through its rear end, a pressure cylinder at the rear end of the ejecting tube, an exhaust cylinder at the rear end of the exhaust cylinder, and a screw, engaging the yoke,

slidable on said mandrel body and to a from the to move the head to loosen the whose forward end closes the rear end of the:

pressure cylinder.

15. In a pa er shell machine, the combination withthe orming mandrel, of an ejecting tube extending from the'for'ward end of the mandrel through its rear end, a pressure cylinder at the rear end of the ejecting tube, an exhaust cylinder atthe rear end of the mandrel, a yoke secured to the exhaust cylinder, a stuffing box between the rear end of the exhaust cylinder and the forward end of the pressure cylinder through which the e'ectin tube extends, a screw engaging the yo e an havin a head closing the end of the pressure cylin er, and a nut on the screw tightening against the yoke. I

In testimony of which invention, I have hereunto set my hand, at Paulsboro, on this 3rd day of February, 1908. j I JOHN CHESNEY.

f Witnesses: i

'WILLIAM J. ADAMSON,

Guns. M. GWILLIAM.

Cbrr eciien in Letters; Fateht N0. 914,3841

upon the-epplication of John Ohesney, 0f: Paulebore, 'ment in PaJper-She1l Machinesf? an error appears New Jersey, for air improvelit is hereby certified thet in Letters Patent No. 914,384,

in the printed specification requiring cerrection, as follows: In the heading of the specifiqation the serial number #417,468 should read 417,468; and that the said Letters-Patent should be read with thie correction therein that, the same may conferxh to the record of the case in the Patent ()fiice. v I

Signedand seatled this Sth-day of April, A. 11)., 1909. v

' ESEAJLJ Y efe. BiL mGe 1 7 Acting Commissioner of Petents. 

